See ziglang/fetch-them-macos-headers#2 for more details. The path
forward looks like one of the following:
* Ony provide headers for the oldest supported macOS (currently 10.13
but soon to be bumped to 10.14).
* Provide headers for multiple versions, and select based on the Zig
target OS version range minimum.
* Don't try to provide macOS headers.
If we don't tackle the version problem, we would have to re-introduce
the ability to detect and depend on native system headers if we wanted
to support C/C++ code that used newer OS definitions.
This patch also adds support for `#include <mach/mach_time.h>`.
Also related: #5236
these new files are generated by recursively including:
sysexits.h
mach/mach.h
sys/attr.h
sys/mount.h
crt_externs.h
execinfo.h
all of which are depended on by LLVM libraries.
This reverts commit bb9c3118ed5fdc16b8e2d9882375005c2a62d0cc, reversing
changes made to 7015d84e0ca6f02fede45621571084df98dda712.
This is missing quite a few headers
Clang pretends to be gcc 4.4 and that causes some re-definition errors.
The problem has been reported to the upstream some time ago but nothing
was done about it.
It was using __GNUC__ < 8 to check if _xgetbv intrinsic is available.
Since we always use zig cc with this header, we know we have clang 9,
which does have this intrinsic.
The previous
[instructions](https://github.com/ziglang/zig/wiki/Updating-libc) for
updating musl libc headers had this (repeated for each architecture):
make DESTDIR=build-all/arm install-headers ARCH=arm
However musl's build system does not properly rebuild alltypes.h and
syscall.h from source, instead using whatever is cached from the
previous build. In the case of the previous time that I updated to musl
1.1.23, this happened to be the aarch64 architecture.
As a workaround, one can remove the obj/ directory to force rebuilding
this file. Now the instructions say this (repeated for each architecture):
rm -rf obj/ && make DESTDIR=build-all/arm install-headers ARCH=arm
This commit updates the resulting headers after this workaround is
applied and the process headers tool is run again.
also start prefering NtDll API. so far:
* NtQueryInformationFile
* NtClose
adds a performance workaround for windows unicode conversion. but that
should probably be removed before merging
